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首页> 外文期刊>Applied optics >Polarization independent thermally tunable erbium-doped fiber amplifier gain equalizer using a cascaded Mach-Zehnder coupler
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Polarization independent thermally tunable erbium-doped fiber amplifier gain equalizer using a cascaded Mach-Zehnder coupler

机译：使用级联的Mach-Zehnder耦合器进行偏振无关的热可调掺-光纤放大器增益均衡器

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摘要

A thermally tunable erbium-doped fiber amplifier (EDFA) gain equalizer filter based on compact point symmetric cascaded Mach-Zehnder (CMZ) coupler is presented with its mathematical model and is found to be polarization dependent due to stress anisotropy caused by local heating for thermo-optic phase change from its mathematical analysis. A thermo-optic delay line structure with a stress releasing groove is proposed and designed for the reduction of polarization dependent characteristics of the high index contrast point symmetric delay line structure of the device. It is found from thermal analysis by using an implicit finite difference method that temperature gradients of the proposed structure, which mainly causes the release of stress anisotropy, is approximately nine times more than that of the conventional structure. It is also seen that the EDFA gain equalized spectrum by using the point symmetric CMZ device based on the proposed structure is almost polarization independent. (c) 2008 Optical Society of America.
机译：提出了一种基于紧凑点对称级联马赫曾德尔（CMZ）耦合器的热可调掺-光纤放大器（EDFA）增益均衡器滤波器，并建立了其数学模型，并且由于局部热引起的应力各向异性而使其与偏振有关光学相位变化的数学分析。提出并设计了一种带有应力释放槽的热光延迟线结构，以降低器件的高折射率对比点对称延迟线结构的偏振相关特性。通过使用隐式有限差分方法进行的热分析发现，所提出结构的温度梯度是传统结构的大约九倍，该温度梯度是引起应力各向异性释放的主要原因。还可以看出，使用基于所提出结构的点对称CMZ器件的EDFA增益均衡频谱几乎与偏振无关。 （c）2008年美国眼镜学会。

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